L4925PD datasheet(3/8 Pages) STMICROELECTRONICS

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ELECTRICAL CHARACTERISTICS (VS =14V Tj =–40 to 125

°C unless otherwise specified;

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Output Voltage

VI = 6 to 28V; IO = 1 to 500mA

4.90

5.10

Output Voltage

VI = 35V; T <1s;

IO = 1 to 500mA

5.50

VDP

Dropout Voltage

IO = 100mA

IO = 500mA

0.2

0.3

0.6

VIO

Input to Output Voltage

Difference in Undervoltage

Condition

VI = 4V; IO = 100mA

0.5

VOL

Line Regulation

VI = 6 to 28V; IO = 1 to 1mA

VOLO

Load Regulation

IO = 1 to 500mA

ILIM

Current Limit

VO = 4.5V;

VO = 0; Foldback characteristic

550

1000

250

1500

IQSE

Quiescent Current

IO = 0.3mA

190

360

µA

Quiescent Current

IO = 500mA

RESET

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VRT

Reset Threshold Voltage

4.5

5.2

VRTH

Reset Threshold

100

200

tRD

Reset Pulse Delay

CT = 100nF; tR > 100

µs

100

140

tRR

Reset Reaction Time

CT = 100nF;

µs

VRL

Reset Output LOW Voltage

RRES = 10K

Ω to VO;VS => 3V

0.4

IRH

Reset Output HIGH Leakage

Current

VRES =5V

µA

VCTth

Delay Comparator Threshold

VCTth hy

Delay Comparator Threshold

Hysteresis

200

PREREGULATOR

VREF

1.23V

GND

RESET

REG

L4925N

RES

D95AT153

VBAT

Vout

RES

APPLICATION CIRCUIT DIAGRAM

For stability: CS >1

µF; CO >10µF;ESR < 2.5Ω at 10 KHz

Recommended for application: CS =CO =10

µF to 100µF

L4925

3/8

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